The British government claimed Saturday that it has "exposed" a plot by the Kremlin to install a pro-Russia leader in Kiev, as Moscow demanded it "stop spreading nonsense."

"We have information that indicates the Russian Government is looking to install a pro-Russian leader in Kyiv as it considers whether to invade and occupy Ukraine," the Foreign Office said in a statement released around midnight Saturday.

It added that "the former Ukrainian MP Yevhen Murayev is being considered as a potential candidate."